By crossing different cannabis seeds with specific characteristics, breeders can produce new seeds that combine the advantages of both parents into new cannabis plants with improved qualities. These can be a better taste, a more compact size, enhanced crop production, shorter growing periods and a better resistance to disease. Dutch cannabis seed breeders, especially from Amsterdam, are world famous for their original, high quality seed strains.
Often specific Indica and Sativa strains are combined into hybrid plants with a great, unique combination of characteristics, depending on their resulting Indica/Sativa mixed genes. Medical marihuana strains are hybrid strains intended for medical marihuana users, specificly selected to produce plants with high amounts of CBD and low amounts of THC.